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[PATCH] NUMA: Add zone_to_nid function

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There are many places where we need to determine the node of a zone.
Currently we use a difficult to read sequence of pointer dereferencing.
Put that into an inline function and use throughout VM.  Maybe we can find
a way to optimize the lookup in the future.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Lameter
2006-09-25 23:31:55 -07:00
committed by Linus Torvalds
parent 4415cc8df6
commit 89fa30242f
9 changed files with 17 additions and 13 deletions
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6
mm/mempolicy.c
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@@ -487,7 +487,7 @@ static void get_zonemask(struct mempolicy *p, nodemask_t *nodes)
switch (p->policy) {
case MPOL_BIND:
for (i = 0; p->v.zonelist->zones[i]; i++)
node_set(p->v.zonelist->zones[i]->zone_pgdat->node_id,
node_set(zone_to_nid(p->v.zonelist->zones[i]),
*nodes);
break;
case MPOL_DEFAULT:
@@ -1145,7 +1145,7 @@ unsigned slab_node(struct mempolicy *policy)
* Follow bind policy behavior and start allocation at the
* first node.
*/
return policy->v.zonelist->zones[0]->zone_pgdat->node_id;
return zone_to_nid(policy->v.zonelist->zones[0]);
case MPOL_PREFERRED:
if (policy->v.preferred_node >= 0)
@@ -1649,7 +1649,7 @@ void mpol_rebind_policy(struct mempolicy *pol, const nodemask_t *newmask)
nodes_clear(nodes);
for (z = pol->v.zonelist->zones; *z; z++)
node_set((*z)->zone_pgdat->node_id, nodes);
node_set(zone_to_nid(*z), nodes);
nodes_remap(tmp, nodes, *mpolmask, *newmask);
nodes = tmp;